Jim, don't understand about the air bubbles. The engine stops in full throttle, but before reaching the full throttle (push) it slows down as you push the stick (like if at some point it starts to iddle again, then dies), Kinda funny, if before it stops you pull the stick, it will recover, but no way it goes beyond a point without slowing down then stopping. aNY IDEAS? tHANKS~!